Signaling bell



April 29 1924.

1,492,003 K. STAHL SIGNALING BELL Filed June 28, 1920 YINVLNTOR:

Patented Apr. 29, 192d.

KARL STAI-IL, or FRIEDRICHSHAFEN, GERMANY, ASSIGNOR TO THE FIRM LUETL,

stares hddhdtd SGHIFFBAU ZEPPELIN GES'ELLSGHAFT MIT BESQHRANKTERHAFTUNG, OF FRIED- nronsnarnn, GERMANY.

SIGNALING BELL.

-To all whom it. may concern:

Be it known that I, KARL STAHL, a citizen of the German Empire, residingat Friedrichshafen a/B., Germany, have invented certain new and usefulImprovements in Signaling Bells, of which the following is aspecification.

My invention refers to signaling bells with mechanical operation at adistance and more especially to the attachment of the parts serving towork the mechanism for operating at a distance, as well as theconstructions of the signaling device proper.

It is a well-known fact that all signaling bells worked by a tractionwire very easily fail when worked from a large distance. The reason forthis is found in the more or less considerable sagging of the tractionwire which, besides on the distance between the points of support of thetraction elements and the dead weight of the traction wire, depends verymuch on the variations of temperature. On the other hand the reliabilityin working of these parts is then particularly endangered if they areincluded in a body constantly in motion and subjected permanently toconcussions, such as an air-ship. For the traction wires not kept taut,easily begin to oscillate owing to which a spontaneous striking ofthe'bells can often not be impeded. Moreover, the signaling bells withtraction wire motion hitherto known, generally have a rather shortstroke which renders it very diflicult to give a clear signal.

The said draw-backs also adhere to such signaling bells where theworking of the bell takes place through the agency'of an endlesstraction wire. Besides the facts that this type of signaling bellscannot be applied with advantage everywhere owing to their complicatedtraction wire guiding appliances and their costs of construction, theirexpensiveness in material and their weight are comparatively speaking,very high. This latter point proves especially disadvantageous in theconstruction of airships where a plurality of such signaling apparatusare always fitted in.

It is the object of the present invention to create a mechanicalsignaling apparatus which diifers from those hitherto known by the factthat the sagging of the traction wires serving to operate it at adistance, is reduced toa minimum which no longer endangers thereliability of working. Furthermore it is its endeavor to make: theemployment of signaling bells with long traction wires possible evenunder the very unfavorable conditions of space in large aircraft. Moreespecially it is its object to ensure the production of long strokes ofthe hell or long-sustained ones, respectively with a single giving ofthe signal.

The object of the invention therefore consists of a signaling bell inwhich, as striking bodies, several centrifugal hammers are made to servewhich rotate outside the bell and whose common shaft is developed asarope drum for a traction wire. The traction wire being wound up on adrum, a long way of displacement which neutralizes pos sible sagging,can easily be obtained for the traction wire in giving signals. Therotating centrifugal hammers, however, owing to the quick repeatedrotation of the shaft,

strike the bell repeatedly, thus ensuring a 'here removed from allinfluences of the weather, besides consuming very little space.

The connection of the centrifugal hammore with the shaft can be chosenaccordin to liking, but special advantages are 0 fered by an arrangementin which. in 210- cordance wlth the invention, the hammer I arms bearingthe hammer disks proper on the one hand and fitted on a disk-likeenlargement of the driving shaft on the other hand, possess ample playat least in the one point of connection, or link respecitvely, so thateven with the hammer arms directed radially rebounding of thehammerdisks from the bell is made possible. For in this manner a pure andclear sound of the bell is called forth even with the quickest motion ofthe traction wire. as the hammer disks striking on the bell, can notonly give way in the direction of the periphery of the :incross-section.

centrifugal circle together with the hammer arms, but also, ifnecessary, alone and in any desirable direction. By this means not onlythe way and the time for the hamm'er to fly back from the bell isreduced,

but its immediate return into the striking position is considerablyhastened.

The drawing attached to this specification and forming part thereof,illustrates by way of example a signaling bell arrangement in'accordancewith my inventionin V apurely.diagrammatical manner.

' Fig. 1 of the drawings shows an axial cross-section of a signalingbell for operation by traction wire, taken on the line 11 in Fig.2. Fig.Qis the pertinent top view, partly A bell A is screwed, in a manneralready known as such, to a support C with a pillarbolt B inserted inbetween. A casing D closed'nearly all around, is fastened on the supportC removably andin such a. manner 7 gal hammer arms. K are linked on. Intheir link parts they are provided with slots -K and in their freefork-shaped'end's they each'contain a hammer diskL which is fitted thatthe part of the bellto be struck, projects in to the casing a littlethrough an aperture (23 provided in the casing D. A shaft E is fittedrotatably in bearings in the sides of the casing D approximately on alevel with the rim of the bell. The. shaft E besides the rope drum F isprovided with 2 disks G and alug H; These parts are connected rigidlywith the shaft. To the rope drum F a wire cable J is attached and woundaround. the drum several'times with its loose end. I Through an aperture(1* provided in the casing D itis then led' to a *commanders standsituated at some distance, Between the disks G several centrifuon itsgudgeon K with a considerable .amount of play. A spiral spring M,contained in a spring casing N, is suspended fromthe lug H. "Thespringcasing N is secured-to the casing. D; By pullin the wire I the axle Evis rotated and the ammers L driven outwards by centrifugal ac *ropedrumon said axle.

.rotate and to touch said bell when said axle is rotated and a rope drumon said axle.

2. In a device of the kind described in' combination, a bell, an axleoutside said bell, a hammer connected with said axle so as to rotate andto touch said bell, when said axle is rotated, anda rope drum and aspiral spring onsaid axle;

3. In a device of the kind described in combination, a bell, an axleoutside said bell, a hammer connected with and radially as to rotate andto touch said bell when said 'axle is rotated, and a rope drum on saidaxle.

'displaceablejwith relation to said axleso 4; In a. device of the kinddescribed in combination, a bell, an axle outside said 5 bell, a hammerconnected with said axle so as torotate and to touch said bell when saidaxle is rotated, a'rope drum on said axle and a stationary casingsurrounding senting only two passages one forqpart of the belland theother for the: rope connected with said rope drum.

'5. In a device of the kind described in said'axle, hammer and rope drumand precombination, a" bell, an axle outside said bell, two discs onsaidaxle, two diametrically' arranged pins connecting said discs, a slottedlink on'eachpin and 'a roller' at one'end of each link-adapted when setrevolving, to contact with said bell and a In testimony whereof Iaflix'mysignature.

V KARL STAHL.

